Improvement in sewing-machines



A. WITTNEBEN.

Sewing Machine.

Patented May 30, 1865.

PATENT @rrrcn.

AUGUST \VITTNEBEN,

OF NEW YORK, N. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 48,007, dated May 30, 1865.

To all whom it may concern Be it known that I, AUGUST Wlrrnnnnu, of New York, in the county and State of New York, have invented anew and useful Improvement in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, and tothe letters of reference marked thereon.

Figure 1 represents a front view of my improved sewing-machine with thedriving mechanism in section. Fig.1lis an end view showing the manner of working the needle. Fig. 1H is an end view of the driving-wheel. Figs.

1V and V are details.

Similar figures represent similar parts.

The nature of my invention consists in the. arrangement of a revolving driving-wheel acting through movable or sliding pins upon a lever by means of internal cams or projections, saidlever operating the feeding-pad, as well as the needle-bar.

In the accompanying drawings, A represents theframe of the machine, and B the table or foot of the same, both cast in one piece. To this foot B a frame, 0, is firmly secured, provided with a centralhub,D,havingan opening for the end of the lever E to pass through. This frame 0 is turned outcylindrical, and the driving wheel or ring F is fitted so as to be supported in said frame 0 and to turn freely in the same. A pin, G, is attached to the outer end of this driving-wheelF, to which the rod H is attached, and through which the wheel or ring F is made to turn. On the inner side of this ring three cams or projections, a b o, are arranged, situated in different planes and through the heel D. Three pieces, all) '0, are fitted in'a position corresponding with the cams a, b, and 0, respectively, and capable of sliding easily in their holes in said hub D.

Eis a leverturning on the pin din thebracket f. This bracketj' is attached by means of a bolt or pin, g, to a bracket, k, fastened to the frame A in such a manner that said bracketf can turn around this pin g, forming thereby a universal joint, so as to allow the lever E to be moved upward and downward,as well as side wise, as may be desired, and for the purpose hereinafter described. Nearthe forward end of this lever E the feeding-pad L is attached. The same may either be screwed into this lever E, as shown in the drawings, for the purpose of raising or lowering the said pad L, or the same may be attached by means of asliding rod and secured in the desired position by means of a set-screw. This pad acts upon the top side of the material to be operated on, and is situated near the front of the needle. A spring-rod, NV, provided with a small roller and passing through a guide, It, fast to the frame A, acts on the top of the lever E so as to press the feedingpad L down upon the material.

M is a lever turning on a pin, m, fast to the end of the frameA and connected with the lever E through the pin n, working in a slot made in said lever M. The other end of said lever M is connected through the rod N with the needle-bar P.

Itis the presser-bar, situated close behind the needle, and constructedin the usual way, except that a projection, S, is arranged on the same below the lever E and so situated that when for the purpose of introducing or removing the cloth said presser-bar It is moved upward by means of the cam-lever T, this projection 5 willcome in contact with said lever E and lift thereby the same, as well as the feeding-pad L, upward and press the needle-bar P slightly downward; but the parts must be relatively so adjusted as that when this is done the needle shall not descend far enough to penetrate the cloth.

The operation of the machine is as follows: Motion being given to the wheel or ring F through the rod H, the cam a in said ring 1 comes in contact with the pin a, forcing the same inward and down upon the end of the lever E, so as to force thereby the forward end of said lever E upward against the action of the spring-rod W, by which operation the feedingpad L will be lifted up and motion be given to the lever M, and through the same to the neodle-barl- ,forcing the needledownward through the material. (See Fig. II, red lines.) When the point 2 of the cam 60 comes against the pin a, theneedle-bar and consequently the needle, will be moved a little upward, so as to form thereby a loop in the thread, and remain in that position while passing through that part of the circle from 2 to 3 (see Fig. III) where the surface of the cam is concentric, and during which time the shuttle (not shown in the drawings) is made to pass through the loop which the thread has formed. When the point 3 of cam a has passed the pin a the spring-rod w can act again upon the lever E so as to force the same, and consequently the feeding-pad L, downward, and by which downward operation the needle-bar P is likewise moved again upward, so as to bring the needle out of and clear of the material. At the same time the pin a was near the point 2 of the cam a, and consequently while the pad L was lifted up from the material, the cam I) has begun to act against the pin 1), pressing the same against theback side of the bar E, by which operation the forward end of said bar or lever E, together with the feeding-pad L, has been moved near to the needle and remains in that position when the same is brought again down upon the material.

When the cam a has moved clear of the pin a, and the feedingrad L is forced down again upon the material, and the needle-bar P has been moved upward, the cam 0 will come against the pin 0, forcing thesame against the front side of the lever E, so as to move thereby the forward end of the lever E outward or away from the needle, and as the feeding-pad L is pressing now upon the material the same will move thereby the material so much forward and away from the needle equal to the length of one stitch. The cam a comes then against the pin a, when the same operation above described will be repeated.

The rear end of the lever E, where the same passes through theopening in the hub D, is provided with aplate, Y, capable of being moved Instead of the spring-rod VV', a fourth cam, 20, (see red lines, Fig. 1H,) may be arranged in the ring F, operatingapin, to, acting against the under side of the after end of the lever E, so as to press the forward end of said lever, and consequently the feedingpadL, downward upon the material at the desired times, and at the same time move thereby the needlebar P upward.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The employment and use of a revolving wheel,-F, with internal cams acting through movable pins upon the lever E, in the manner and for the purpose substantially as described.

2. The arrangement of the lever E, moving on a universal joint, in combination with the feeding-pad L, and operated by the wheel F and the spring-rod W or its equivalent, in the manner as specified.

3. Operating the needle-bar P from the end of the lever E by means of thelever M and rod N, in the manner substantially as set forth.

4. The arrangement of the plateY on the end of the leverEfor the purpose of regulating the amount of feed, operating substantiallyin the manner specified.

5. The application of the feeding-pad above the material operated upon, when arranged and operated in the manner substantially as described.

6. The combination of the revolving ring F with internal cams, the pins a b a, lever E, feeding-pad Lfspring-rod W, lever M, rod N, and needle-bar P, when arranged and operating in the manner and for the purpose substantially as set forth and specified.

AUGUST WITTNEBEN.

Witnesses:

HENRY ROEDER, .QHAs. MCCARTHY. 

